在linux系统上构建mysql服务器

# yum -y install perl-Date-Dumper perl-JSON perl-Time-HiRes

# tar -xvf mysql-5.7.24.tar               //解压mysql包

[root@localhost ~]# rm -rf /etc/my.cnf

[root@localhost ~]# rm -rf /var/lib/mysql/*

[root@localhost ~]# rpm -e --nodeps mariadb-server mariadb

#yum -y remove mariadb-libs.x86_64 1:5.5.52-1.el7

#yum -y install mysql-community-client mysql-community-common mysql-community-devel mysql-community-embedded mysql-community-embedded-compat mysql-community-embedded-devel  mysql-community-libs mysql-community-libs-compat mysql-community-minimal-debuginfo mysql-community-server mysql-community-test

#yum -y install mysql-community-*.rpm

# rpm -qa | grep -y mysql

# systemctl start mysqld
# systemctl enable mysqld //设置开机自启
# systemctl status mysqld
[root@proxy mysql]# ss -antulp | grep mysqld //查看服务启动端口
# ps aux | grep mysqld //查进程

# grep password /var/log/mysqld.log
#  grep 'temporary password' /var/log/mysqld.log //随机生成的管理密码

# mysql -hlocalhost -uroot -p'pIhMu,i2OS#,' //用初始密码登录
mysql> \h //登录成功后，查可用的快捷键

mysql> alter user root@"localhost" identified by "123qqq...A";

mysql> show variables like "%password%";              //查询密码有关的变量
mysql> set global validate_password_policy=0;       //只验证长度
mysql> set global validate_password_length=6;      //修改密码长度为6位
mysql> alter user root@"localhost" identified by "123456";             //修改root密码为123456